This is, IMO, THE best sharpening system on the market. I've been using mine for years now and the only down side is finding replacement stones when you wear them out. After ten years plus of use I can live with that. The system lets you choose your sharpening angle depending on what you use it for from a very sharp but brittle steep angle to a more heavy duty angle for use on the farm or job and a couple of angles in between. The only downside to it is that it can be slightly difficult to use without using the table clamp system. The little plastic stand that you can buy is worthless because it moves too easily so definitely add the table clamp type holder. Also, it is not great for less than a 2.5 to 3 inch blade. It will work, but only at heavy duty angles. I liked mine so much that I bought them for my nephew and my brother-in-laws for Christmas and even they could sharpen knives with them. Now I no longer have to sharpen for them. If you can read and follow directions, you can sharpen a knife with this system.